Horologinella biconvexa subsp. granulata
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subsp. granulata Zheng Yuefang and Liu Xuexian in Liu Zhili et al., 1992, p.70, pl.10, figs.3-8. Holotype: Liu Zhili et al., 1992, pl.10, fig.7. Taxonomic senior synonym: Tetrachacysta allenii, according to Xu Jinli et al. (1997, p.42). Age: early Tertiary. Parent: Horologinella biconvexa
